# 十三行八字 vs Trinity

The clearest difference is in-app purchases: Trinity at none against 十三行八字's 2. Trinity also leads on iOS requirement (17.6 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 十三行八字 sells 2 in-app purchases, starting at $17.99 per month. Trinity asks for nothing beyond the download.

十三行八字 ships an update every 3 weeks, Trinity every 9 days. The most recent releases landed on September 4, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | 十三行八字 | Trinity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (7 ratings)](https://appshunter.io/ios/app/id1446211447/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Subscription | — |
| Size | 44 MB | 74 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Firm 13 Limited](https://appshunter.io/developer/294205351) | [Ho ming Lau](https://appshunter.io/developer/1829678631) |

## What reviewers say

### 十三行八字

[App page](https://appshunter.io/ios/app/id1446211447)

This app provides professional Bazi (Eight Characters) chart analysis with intelligent visualization of complex relationships. It offers detailed astrological data, customizable settings, and over 50 divine stars for in-depth readings. Available on iPhone, iPad, and Mac with iCloud synchronization.

**Highlights:** Intelligent analysis and visualization of 'Xing Chong He Hui' relationships, Detailed astrological data including Bazi and luck cycles, Support for over 50 divine stars with customizable options, iCloud synchronization across iPhone, iPad, and Mac, iPad split-screen and floating window support for dual chart analysis, Dark mode compatibility, Multi-language interface (Traditional and Simplified Chinese)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月費計劃 | $17.99 | per month |
| 全年優惠計劃 | $49.99 | per year |


### Trinity

[App page](https://appshunter.io/ios/app/trinity/id6756862652)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 十三行八字 free?

十三行八字 is free to download, with in-app purchases available.

### Is Trinity free?

Trinity is free to download, with no in-app purchases.

### Do 十三行八字 or Trinity have ads?

Neither 十三行八字 nor Trinity shows ads.

### Which is updated more often, 十三行八字 or Trinity?

十三行八字 ships an update every 3 weeks, and Trinity every 9 days. Most recently, 十三行八字 was updated on September 4, 2026 and Trinity on September 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*